An electromagnetic induction type rocker potentiometer is provided, including a base, a sliding disc, a rocker handle, two rocking arms, an iron housing and two potentiometer assemblies. The potentiometer assemblies are disposed on the iron housing and respectively include a shell, a rotor, a permanent magnet and a magnetic sensing circuit board. The magnetic sensing circuit board is molded on the shell to accurately position a magnetic sensor, thereby improving sensing accuracy. The permanent magnet is cuboid and a distance between the permanent magnet and the magnetic sensor in an axial direction of the rotor does not change along with rotation of the rotor. As the rotor rotates forward or backward, the magnetic strength of the permanent magnet at the magnetic sensor increases or decreases linearly, so that the change process of induction signal is synchronized with the rotation process of the rotor.
Legal claims defining the scope of protection, as filed with the USPTO.
1. An electromagnetic induction type rocker potentiometer, comprising: a base, a sliding disc, a rocker handle, a lower rocking arm, an upper rocking arm, an iron housing, a first potentiometer assembly, and a second potentiometer assembly; wherein the base is provided with a cavity, the sliding disc is disposed in the cavity of the base, the rocker handle is disposed on the sliding disc, the iron housing is disposed outside the base, the lower rocking arm and the upper rocking arm are individually sleeved on the rocker handle, the upper rocking arm is located above the lower rocking arm, and two ends of each of the lower rocking arm and the upper rocking arm individually extend outwards to outside the iron housing and the base; wherein the first potentiometer assembly and the second potentiometer assembly are individually disposed on the iron housing, and each of the first potentiometer assembly and the second potentiometer assembly comprises: a shell, a rotor, a permanent magnet, and a magnetic sensing circuit board; wherein a left side of the shell is provided with a first concave cavity, the rotor is accommodated in the first concave cavity and is rotatable relative to the shell; a right side of the shell is injection molded to seal the magnetic sensing circuit board, a bottom end of the magnetic sensing circuit board is connected with metal pins, the metal pins extend downwardly to outside the shell, the magnetic sensing circuit board has a magnetic sensor disposed thereon, and the magnetic sensor faces towards a bottom of the first concave cavity at the left side of the shell; wherein the rotor is provided with a first through hole and a second concave cavity, the permanent magnet is fixedly mounted in the second concave cavity, a right side of the permanent magnet faces towards the magnetic sensor, a distance between the permanent magnet and the magnetic sensor in an axial direction of the rotor does not change along with rotation of the rotor; and wherein one of the two ends of the lower rocking arm is rotatably inserted into the first through hole of the rotor of the first potentiometer assembly, and one of the two ends of the upper rocking arm is rotatably inserted into the first through hole of the rotor of the second potentiometer assembly.
2. The electromagnetic induction type rocker potentiometer according to claim 1, wherein a shape of each of the second concave cavity and the permanent magnet is cuboid.
3. The electromagnetic induction type rocker potentiometer according to claim 1, wherein a side portion of the cavity of the base is connected with a plurality of guide feet, and a side portion of the sliding disc is connected with a plurality of guide bars corresponding to and slidably engaged with the plurality of guide feet; wherein a middle portion of the cavity of the base is provided with a vertical central rod, a middle portion of the sliding disc is provided with a vertical central tube, the central tube has a central through hole with opened ends, and the central rod is inserted upwards into the central through hole of the central tube; wherein a lower end of the rocker handle is provided with a rocker base, the rocker base slidably fits with an upper surface of the sliding disc, a lower side of the rocker base is provided with a spherical protrusion, and the spherical protrusion is arranged above a middle portion of the central through hole; and wherein an upper end of the central rod is provided with a frustum-shaped protrusion, an upper end of the frustum-shaped protrusion is provided with a concave surface, and the spherical protrusion fits with the concave surface.
4. The electromagnetic induction type rocker potentiometer according to claim 3, wherein inner walls of the plurality of guide feet are provided with a plurality of guide slots, respectively; and at least one of the plurality of guide slots is provided with a position limit mechanism, and the position limit mechanism is configured to limit a sliding endpoint position of a corresponding one of the plurality of guide bars.
5. The electromagnetic induction type rocker potentiometer according to claim 1, wherein the lower rocking arm comprises: a lower rocking arm body, and a lower rocking arm rotation shaft connected with two ends of the lower rocking arm body; and the lower rocking arm body arches upwards and is movably sleeved on the rocker handle; and wherein the upper rocking arm comprises: an upper rocking arm body, and an upper rocking arm rotation shaft connected with two ends of the upper rocking arm body; and the upper rocking arm body arches upwards and is movably sleeved on the rocker handle.
6. The electromagnetic induction type rocker potentiometer according to claim 5, wherein the first through hole of the rotor of each of the first potentiometer assembly and the second potentiometer assembly is one of a I-shaped through hole and a rectangular through hole; wherein an end portion of each of the lower rocking arm rotation shaft and the upper rocking arm rotation shaft is provided with one of an I-shaped insertion bar and a rectangular insertion bar that is matched with the first through hole; wherein a pin shaft is inserted between the lower rocking arm and the rocker handle, and an axial direction of the pin shaft is consistent with an axial direction of the upper rocking arm rotation shaft.
7. The electromagnetic induction type rocker potentiometer according to claim 1, further comprising a spring, wherein a first spring seat is disposed in the cavity of the base, a lower end of the sliding disc is provided with a second spring seat, a lower end of the spring is disposed above the first spring seat, and an upper end of the spring is disposed below the second spring seat.
8. The electromagnetic induction type rocker potentiometer according to claim 1, wherein the right side of the shell is provided with a second through hole, the second through hole is communicated with the first concave cavity and located between the first concave cavity and the magnetic sensing circuit board, the magnetic sensor leftwards passes through the second through hole and extends into the first concave cavity, and the magnetic sensor is packaged as an integrated circuit chip.
9. The electromagnetic induction type rocker potentiometer according to claim 1, wherein the second concave cavity is located at a lower end of the rotor, a right side of the second concave cavity is opened, the permanent magnet is snapped into the second concave cavity from right to left, a left side of a middle portion between two magnetic poles of the permanent magnet is provided with a magnet slot, and the second concave cavity is provided with a convex bar matched with the magnet slot.
10. The electromagnetic induction type rocker potentiometer according to claim 1, wherein a bottom of the first concave cavity is provided with a first limit surface, a right side of a middle portion of the rotor is provided with a circular boss, the first through hole penetrates through the circular boss, and a right side surface of the circular boss and the first limit surface are position-limiting fitted with each other; and wherein a lower end of the first concave cavity is provided with an arc-shaped limit block, a left side of the arc-shaped limit block is provided with an arc-shaped limit surface, and a right side surface of a lower end of the rotor and the arc-shaped limit surface are position-limiting fitted with each other.
11. The electromagnetic induction type rocker potentiometer according to claim 1, wherein corners at the left side of the shell are provided with three shell positioning columns extending leftwards, and the iron housing is provided with iron housing positioning holes insertedly matched with the three shell positioning columns respectively; and wherein a middle portion of the left side of the shell is provided with two positioning hooks extending leftwards, and the iron housing is provided with positioning slots configured to be snapped with the positioning hooks, respectively.
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April 22, 2023
June 3, 2025
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